You might want to go check the BLM threads on this page as there's been a LOT of discussion on this. The best stats for BLM dps are INT > DET > SSPD > CRIT, in that order. You don't want the Novus to be ACC/SSPD as that'd be the Laevateinn, and frankly really pointless if you're going for improved damage.
BLMs do have good burst ability, but it is in no way determined by our CRIT stat. Rather it's governed by having procs ready to be used quickly (along with Swiftcast/Convert/ethers/etc...). Sustained damage is a lot more useful to BLMs than a 0.1% increase in crit chances. The only reason the HA Staff is top dog is it's WD and INT stats. Putting SSPD and DET on the Novus is the best combination you can get (and if you want 251 PIE all the time, using the Novus stats for it isn't a bad idea either).